I'm assuming this is for your league in your sig? If so, then there's no way I'm doing this deal. In your format, which is hugely goal-heavy, and counts hits, Ovi is more valuable than Sid, not to mention Sid's knack for rarely staying healthy for a full season. If Ovi can return to his 50+ goal, 300+ hit self (like he showed the second half of the season, then you easily have the best player in your format.
So right away, you trade away the most valuable player in the deal given your format IMO. On top of that, you also ship Benn who is going to be a 70+ point player next season and is also a multi-cat contributor. Markstrom is a blue-chip goalie who could be money in the bank in 2-3 years if Florida can pull it together.
In my opinion, you are vastly overpaying for Howard who is a mediocre goalie on a declining Detroit team. You said it yourself, you finished in second place, why panic? Crazy shit happens all the time in H2H, and you get unlucky or run into a crazy hot team.....you can't make knee-jerk reactions and make major trades to try and compensate, it's a recipe for disaster. With Price and Niemi you are more than fine in net.......get rid of Bryz and find a solid #3 and you are set. You are forcing a move where one doesn't need to me made IMO. Wait and see what happens with Markstrom this season.....Florida will be healthier and a better team. He may do just fine as your #3 goalie behind PRice and Niemi. He sure can't do much worse than Bryz did, look at it that way, haha.
My recommendation is to not get an itchy trigger finger.....there is going to be a ton of goalie movement this offseason, if you are going to make a move at least wait and see how it all shakes out.